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Genetics
Test Description: Review
Instructions: Answer all questions to get your test result.
1) Factors that control traits are called ________?
A
recessives
B
parents
C
purebreds
D
genes
2) Scientists call an organism that has two different alleles for a trait a _____.
A
purebred
B
factor
C
trait
D
hybrid
3) An organism’s physical appearance is its _____.
A
phenotype
B
co-dominance
C
heterozygous
D
genotype
4) Which term refers to physical characteristics that are studied in genetics (for ex. blue eyes)?
A
hybrids
B
offspring
C
traits
D
generations
5) The different forms of a gene are called ______?
A
factors
B
alleles
C
traits
D
masks
6) What does the notation tt mean to a geneticist?
A
two recessive allels
B
at least one dominant allele
C
two dominant allels
D
one dominant and one recessive allele
7) An organisms genotype is its ______.
A
physical appearance
B
genetic makeup
C
stem height
D
feather color
8) A structure in the cell’s nucleus that contains the genetic information or DNA _____.
A
gene
B
chromosome
C
link
D
allele
9) The scientific study of heredity _______.
A
botany
B
chemistry
C
ecology
D
genetics
10) A cross that shows the genetic crossing of a single trait is a _____.
A
trait crossing
B
cross roads
C
di-hybrid cross
D
mono-hybrid cross
11) What does a Punnett square show?
A
all the possible outcomes of a genetic cross
B
All of Mendel’s discoveries about genetic crosses
C
Only the recessive alleles in a genetic cross
D
Only the dominant alleles in a genetic cross
12) Which trait is controlled by a dominant allele? : W= white flowers, w=purple flowers
A
purple
B
blue
C
white
D
pink
13) Which trait is controlled by a recessive allele? : W= white flowers, w=purple flowers
A
purple
B
blue
C
pink
D
white
14) By analyzing a blood sample, a doctor can tell a patient whether his or her children might inherit a genetic condition. This is true even if the patient doesn’t have that condition. This type of analysis tells the doctor about a patient’s ______.
A
chromosomes
B
dominant traits
C
phenotype
D
genotype
15) What units found on the chromosomes are responsible for an individual’s inherited characteristics?
A
phenotype
B
proteins
C
mitochondria
D
genes
16) Every person who inherits an allele for Huntington’s disease will develop the disease. This condition must be _____.
A
recessive
B
hybrid
C
dominant
D
heterozygous
17) Brown-eyed parents have two brown-eyed children and one blue-eyed child. This can occur because _____.
A
the combination of parental alleles is different in each offspring
B
all humans carry an allele for blue eyes
C
the combination of parental alleles is the same in each offspring
D
environmental factors can change eye color
*select an answer for all questions
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